Printing-press.



R. MIEHLE. PRINTING PRESS. APPLIGATION FILED 1 313.17, 19061 zmmwnn JAN. 28, 1911.

Y Patented Apr. 11, 1911.

mhun 1 1 INVENTOR WITNESSES:

THF NORRIS psrzas co. WASHINGTON, n. cy

ROBERT MIEI-ILE, OF CHICAGO, ILLINOIS, ASSIGNOR T0 MIEI-ILE PRINTING PRESS & MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PRINTING-PRESS.

Application filed February 17, 1906, Serial No. 301,624. Renewed January 28, 1911.

1'0 all whom it may concern:

Be it known that 1, ROBERT MIEHLE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Printing-Presses, of which the following is a full, clear, and eX- actspecification.

This invention relates to cylinder printing presses, and more especially to mechanism for raising or lowering the cylinder, and to the cylinder tripping means for preventing the operation of such mechanism at the option of the pressman when it is de sired to have the form pass the cylinder during the impression stroke without contacting therewith. In devices of this character, the raising or lowering of the cylinder is ordinarily accomplished by mechanism containing either a single cam located on one side of the press and connected by a cross shaft arranged below the bed to a lifting devicesuch as an eccentricon the other side; or by independent cams located on both sides, where the construction is such as to preclude the use of the cross-shaft below the bed.

The primary object of this invention is an improvement providing for the use of a single cam on one side of the press, rigidly connected to a lifting device on the other side, in that form of presses in which the space below the bed is completely or substantially occupied by other mechanism, as,-

for example, the form shown in U. S. Patent No. 738,829, issued to me September 15, 1903, and in which any cross-shaft for the described purpose, arranged below the bed, would necessitate a material and objectionable increase in the height of the bed.

Another object of the invention is to provide an improved cylinder-tripping mechanism which shall be eflicientand simple in construction and operation.

With these ends in view, the invention consists in the features of novelty in the construction, combination, and arrangement of parts for accomplishing said objects, and certain other objects which will hereinafter appear, all as fully described with reference to the accompanying drawings, and more particularly pointed out in the claims.

In thesaid drawings-Figure 1 is a side elevation of a printing press, partly broken Specification of Letters Patent.

Patented Apr. 11, 1911.

Serial No. 605,287.

away, embodying this invention. Fig. 2 is a view of the same parts looking from the right in Fig. 1. Fig. 3 is a detail side elevation of the tripping and lifting mechanism, partially broken away, showing the same in the position it assumes when the cylinder is elevated, in full lines, and in the lowered position of the cylinder, in dotted lines. And Fig. 4 is a detail view of one of the eccentrics and its bearings, showing the same in side elevation.

1 is the bed of the press, which is mounted upon the usual frame 2, and over which bed is journaled the usual cylinder 3, whose journals 4 are mounted in suitable sliding boxes 5 in guide jaws or standards 6 arranged at the ends of the cylinder upon the sides of the main frame, in a manner not necessarily different from the ordinary construction. On the upper ends of these guide jaws 6 are arrznged extensions 7, one on each side of the press, and in these extensions are fitted eccentrics 8, one 011 each side of the press, which are connected together by a cross-shaft 9 arranged above the cylinder 3, and which eccentrics serve for imparting to the cylinder 3 the aforesaid movement toward or from the bed. In this exemplification of the invention, the eccentrics are utilized for depressing the cylinder into printing or impression position, while the cylinder is raised out of impression position by means of springs 10 interposed under the boxes 5, in the usual manner. The eccentrics 8, an example of which is shown in Fig. 4, rest upon bearing-blocks 11, which in turn are supported by and slide upon the upper ends of standards 12.

which are formed on or supported by the boxes 5, one of these standards being situated on each side of the press within the bifurcation of the standard 6, and serves to impart the downward depression of the eccentric 8 to the box 5 for compressing the springs and forcing the cylinder into impression position. The upward movement of each of the eccentrics is resisted by an abutment-bearing 13 arranged in the standard 6, and supported by a screw 14, or any other suitable means, screw-threaded in the crown of the standard, and having its lower end operatively connected with the block 13, which is formed to fit against two cylindrical shoulders 15 formed on the eccentric 8,

one at each end thereof, and so disposed with relation to the eccentrics as to constitute its journals. The bearing block 11 fits between these cylindrical shoulders 15, and is thereby held against lateral movement in a direction lengthwise of the axis of the eccentric, as better shown in Fig. 4, and as indicated by dotted lines in Fig. 1, the space between the'side portions of the standard 7 is greater than the length of the block 11, so that as the eccentric rotates, the block will be free to slide back and forth on the upper end of the standard 12.

Motion is imparted to the eccentrics on both sides of the press simultaneously through the agency of a crank arm 16, which is formed on or secured to the eccentric on one side of the press, such crank arm, the eccentric, and the cylindrical shoulders, being all rigidly connected together or formed in one piece, while the shaft 9, which connects the eccentrics across the press, may be attached thereto by means of set-screws 17 at each end thereof, and a collar or hub 18 formed on one of the cylindrical journals 15, and into which collar the set-screw is secured. This crank arm 1.6 is pivoted to the upper end of a link, which is preferably composed of a rod 19 and a plate 20 secured to the lower end of the rod and affording stock for the formation of a slot 21, in which works a lug 22 on one end of the lever 23, which is pivoted at 24, and carries an anti-friction roll 25 at its other end, working in a cam-groove 26, which may be formed in the inner face of the main gear wheel 27, that serves to rotate the cylinder 3 through the intermediary of a pinion 28, as usual in this type of press. At the lower end of the slot 21 is formed a lug with which the lug 22 engages for lifting the rod 19 and thereby depressing the cylinder into impression position, as shown in full lines in Fig. 3. This lug on the plate 20 is shown at 29, and may be conveniently formed by carrying the lower end of the slot 21 to one side, so that the lower end of the link constituted by the rod 19 and plate 20 may be deflected when the lug 22 is at the lower end of the slot, for establishing operative relation between said link and the lever 23 when the deflection is in one direction, or toward the lever 23, or for throwing the lug 29 out of engagement wit-h the lug 22 when the deflection is in the opposite direction, at which time the lug 22 will simply oscillate in the slot 21 without lifting the arm 16, the slot 22 being preferably curved on the are described by the lug 22, so that when the lug 22 is disengaged from the lug 29 there will be practically no movement of the plate 20. This disengagement may be effected at the will of the operator by means of a manually-operated lever or treadle 30, pivoted at 31 to the frame, or other suitable support, and having an arm 32 arranged to engage a lip 33 formed on or secured to the back of the plate 20, sothat when the treadle 30 is depressed the lug 29 will be withdrawn from the lug 22, allowing the latter to ride in the slot 21 without moving the plate 20. As soon as the foot or pressure is released from the trea die 30, it is returned to its former position by any suitable means, such as a. SpllflgQtt, interposed thereunder; and consequently, when this occurs, the lug 22 on the end of the lever will reenter the lateral slot and again engage under the lug 29 as soon as itreaches that point, or, more strictly speaking, the plate 20 will swing" toward the lug 22 and carry the lug 29 thereover, the edges of the slot 21 serving as guides for directing the parts into this position, and the lower end of the plate 20 being carried to one side of the center of gravity, so as to give it a tendency to swing toward the lug 22, and to assume the position shown in Fig. 1, which it takes as soon as the foot is released from the lever 30. As shown in Fig. 2, the plate 20, with its rod 19, is preferably situated on the outer side of the frame, while the treadle and arm 32 are pivoted on the inner side, but their upper ends are deflected across the lower bar of the frame, so that the treadle will be in a position accessible to the foot of the operator, while the arm 32 will be in position to catch the lip 33.

What I claim is:

1. In a printing press of the class described, the combination of a frame, a cylinder mounted to rotate and to rise and fall therein, a reciprocating bed arranged below the cylinder, means below the bed for reciprocating the same and rotating the cylinder, eccentrics operatively related to the cylinder and arranged above the same for imparting bodily movement thereto, said eccentrics having journals, abutment-bearings arranged over said journals for resisting the upward movement of the eccentrics, adjusting screws for holding said abutment-bear ings in position, and means operatively connecting said eccentrics with the bed-reciprocating means.

2. In a printing press of the class described, the combination of a bed, a rotary cylinder movable bodily toward and from the bed, guide-jaws or standards inwhich the cylinder is journaled, extensions rising from said guide-j aws or standards, eccentrics mounted in said extensions, a shaft rigidly connecting said eccentrics together above the cylinder, bearing-blocks for said eccentrics movable toward and from the bed with the cylinder and adapted to impart the movement of the eccentrics to the cylinder, abutment-bearings arranged in said extensions for resisting the upward movement of the eccentrics, means for rotating the cylinder and reciprocating the bed, and means for imparting a rotary movement to said eccentrics, operatively connected with the last said means.

3. In a printing press of the class described, the combination of a bed, a rotary cylinder movable bodily toward and from the bed, standards in which the cylinder is journaled, extensions rising from said standards above the cylinder, eccentrics arranged in said extensions, respectively, and each having cylindrical journals at its ends of larger diameter than the eccentrics, a bearing-block for each eccentric arranged between and held in place by said enlarged journals, means for imparting the downward movement of said bearing-blocks to the cylinder for forcing the latter into impression position, an abutment-bearing engaging said enlarged journals on their upper sides for resisting the upward movement of the eccentrics, a shaft connecting the eccentrics together above the cylinder, means for rotating the cylinder, and means operatively connecting one of said eccentrics to the cylinder-rotating means.

4. In a printing press of the class described, the combination of a bed, a rotary cylinder movable bodily toward and from the bed, standards rising above the bed, journal-boxes for the cylinder slidable in said standards, extensions rising from said standards above the cylinder, eccentrics journaled in said extensions and connected together over the cylinder, bearing-blocks upon which the eccentrics rest, supported on said journal-boxes, means for rotating the cylinder, and means operatively connecting one of said eccentrics with the said cylinder-rotating means.

5. In a printing press of the class described, the combination of a bed, a rotary cylinder movable bodily toward and from the bed, standards rising above the bed and in which the cylinder is journaled, extensions rising from said standards, eccentrics journaled in said extensions, bearing-blocks movable laterally and perpendicularly, and in which the eccentrics bear, means for imparting the perpendicular movement of the bearing-blocks to the cylinder, means for rotat-v ing the cylinder, and means connecting the cylinder-rotating means with one of said eccentrics.

6. In a printing press of the class described, the combination of a bed, a rotary cylinder movable bodily toward and from the bed, standards rising above the bed,

ROBERT MIEHLE.

Witnesses:

FRANCIS A. HOPKINS, CHAS. I-I. SEEM.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

